异步MIMO-OFDM中基于预处理矩阵的迭代检测算法

莫韬甫; 邵士海; 刘田; 唐友喜

doi:10.3724/SP.J.1146.2011.00636

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异步MIMO-OFDM中基于预处理矩阵的迭代检测算法

doi: 10.3724/SP.J.1146.2011.00636

莫韬甫^{* 邵士海刘田唐友喜,},
邵士海,
刘田,
唐友喜

基金项目:

国家自然科学基金(60902027, 60832007, 60901018, U1035002/L05, 61001087, 61101034)，国家科技重大专项(2010ZX03003-002-01, 2011ZX03001-006-01, 2010ZX03007-003)和中央高校基金(ZYGX2010J012, ZYGX2009J008, ZYGX2009J010)资助课题

计量
- 文章访问数: 2916
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- 被引次数: 0
出版历程
- 收稿日期: 2011-06-26
- 修回日期: 2011-12-23
- 刊出日期: 2012-04-19

Pre-processing Matrix Based Iterative Detection Algorithm in Asynchronous MIMO-OFDM

Mo Tao-Fu^{* 邵士海刘田唐友喜
,},
Shao Shi-Hai,
Liu Tian,
Tang You-Xi

摘要

摘要: 针对异步发射MIMO-OFDM链路，论文提出了一种基于预处理矩阵的迭代并行多天线干扰消除方法。该方法在信号发射前，通过预处理矩阵将信号扩展到所有子载波上，从而降低部分子载波深衰落对扩展前原始信号的影响。在接收端，上次迭代的判决错误在干扰重建时被预处理矩阵扩展，缓解了迭代干扰抵消过程中的误差传播。仿真结果表明，在4发2收场景下，误码率为10-5时，5次迭代后信噪比相比于传统的迭代并行多天线干扰消除方法改善约4.5 dB。
- 无线通信 /
- 预处理矩阵 /
- 异步MIMO-OFDM /
- 迭代 /
- 误码率
Abstract: In asynchronous MIMO-OFDM over the selective Rayleigh fading channel, an iterative parallel multi- antenna interference cancellation algorithm based on pre-processing matrix is proposed. Before the signal is transmitted, the symbols are spread over all the subcarriers, which relieve the influence of deep fading in part of the subcarriers. In the receiver, the wrong decision value of last iteration is spread by the pre-processing matrix, which decrease the error propagation in iteration processing. The performance improvement is verified by simulation, when there are 4 transmitters 2 receivers and the Bit Error Rate (BER) is 10-5, SNR is improved about 4.5 dB compared with the traditional iterative parallel interference cancellation algorithm.
- Wireless communication /
- Pre-processing matrix /
- Asynchronous MIMO-OFDM /
- Iteration /
- Bit Error Rate (BER)